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;;; Guix Data Service -- Information about Guix over time
;;; Copyright © 2019 Christopher Baines <mail@cbaines.net>
;;;
;;; This program is free software: you can redistribute it and/or
;;; modify it under the terms of the GNU Affero General Public License
;;; as published by the Free Software Foundation, either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; Affero General Public License for more details.
;;;
;;; You should have received a copy of the GNU Affero General Public
;;; License along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (guix-data-service model license-set)
#:use-module (srfi srfi-1)
#:use-module (ice-9 vlist)
#:use-module (squee)
#:use-module (guix-data-service utils)
#:use-module (guix-data-service model utils)
#:use-module (guix-data-service model license)
#:export (inferior-packages->license-set-ids))
(define select-license-sets
"
SELECT id, license_ids
FROM license_sets")
(define (insert-license-sets license-id-lists)
(string-append
"INSERT INTO license_sets (license_ids) VALUES "
(string-join
(map (lambda (license-ids)
(string-append
"('{"
(string-join
(map number->string
(sort license-ids <))
", ")
"}')"))
license-id-lists)
", ")
" RETURNING id"))
(define (inferior-packages->license-set-ids conn license-id-lists)
(let* ((existing-license-sets
(exec-query->vhash conn
select-license-sets
(lambda (results)
(if (string=? (second results) "{}")
'()
(map
string->number
(string-split
(string-drop-right
(string-drop (second results) 1)
1)
#\,))))
(lambda (result)
(string->number (first result))))) ;; id
(missing-license-sets
(delete-duplicates/sort!
;; Use filter! with list-copy, as filter may return a list that
;; shares a portion of the input list, and therefore could be at
;; risk of being modified when deleting duplicates
(filter! (lambda (license-set-license-ids)
(not (vhash-assoc license-set-license-ids
existing-license-sets)))
(list-copy license-id-lists))
(lambda (full-a full-b)
(let loop ((a full-a)
(b full-b))
(cond
((null? a) #f)
((null? b) #t)
(else
(< (car a) (car b))))))))
(new-license-set-entries
(if (null? missing-license-sets)
'()
(map (lambda (result)
(string->number (first result)))
(exec-query conn
(insert-license-sets missing-license-sets)))))
(new-entries-id-lookup-vhash
(two-lists->vhash missing-license-sets
new-license-set-entries)))
(map (lambda (license-id-list)
(cdr
(or (vhash-assoc license-id-list
existing-license-sets)
(vhash-assoc license-id-list
new-entries-id-lookup-vhash)
(begin
(error "missing license set entry"
license-id-list)))))
license-id-lists)))
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